Circulator for steam-boilers.



E. J. WHEILER.`

PATENTHD DEO. 24, 1907.

GIRGULATOR FOR STEAM BOILBRS.

nrmonmn rILBD 11.28. 1907.

UNITED sTATEs PATENT OFFICE.

EDWIN J. WHEELER, oF BRooKLYN, NEW YORK. i l

i, 'o moULATon Fon STEAM-Romans.

lspecification of Letters Patent.

Appiicafion fiia March ze. 1907. serial ro. 364.591.

Patented Dec. 24,, 1907.

To all whom 'it may coneern: Be it known that I, EDWIN J WHnnLnR, a

citizen of the United States, residing in Brooklyn, Kings county, State of New York, have invented certain new and useful Improvements in Circulators for Steam-Boilers, of which the following is such a full, clear, and exact description aswill enable any one skilled .in the art to which it ap ertains to make and use the same, reference eing had to the accompanying drawings, forming part of this specification.

My invention relates to a mechanical circulator which is adapted to be attached to steam boilers or generators in which the circulation of the water is sluggishor poor.

The principal objects of theinvention are to provide a simple form of mechanical circulator whichis at the same time efficient in producing a good circulation of the water with a positive action, thereby keeping the boiler free from sediment or Scale and maintaining the same heated throughout uniformly, and

Ithus servi-ng to keep the 'boiler free from all as hereinafter fully set forth andV then' t l n e pomted out m the clalms.

I have illustr'ated a type of my invention .in the accompanying drawings, wherein;

Figure 1 is a central horizontal sectional view of 'my improved mechanical circulator shown as mounted u n av detachable manhole cover of a steam oiler. i F ig. 2 is a view` of' the inner end of the agitator mounted upon the man-hole cover, which is shown as detached. Fig.. 3 is an'exterior view of the parts shown in Fig. 1, with the wall of. the oiler omitted and with one edge of the manhole cover broken away, likewise the ends of the clamping yokes..,

Refernng to the drawifngs in 'which like numbers of reference (lesignateV like parts throughout, 1 indicates the wall at the end of a steam boiler or generator and which wall is provided with a man-hole 2 having a removable cover 3 which is provided with posts or bolts 4 fiXed therein and having their outer ends provided with screw threads -5 on which fit screw threaded nuts, the outer ends of the bolts or posts 4 extending loosely through i the erforation 7 in the clamp' oke 8 w i lits-endslz' whi'c is a heavy U-shaped part project' inwardly and is adapted to span the manole' 2 'and by means of which 'and the bolts and ,the nuts, the man-hole cover 3 'is securely clamped and held in place, in .a manner well-known Through a perforation 9 in the man-hole extends a rotary shaft 10 which is rovided upon its inner end with an agitator aving a set of wings or blades 11 which are shaped something like the blades .of a propeller and are attached at an angle which is most effective for agitating the water. 'Between the agitator 11 on the inner end of the shaft and the adj acent side of the wall, 'or the man-hole cover 3, there is fiXed on the shaft 10 a member or collar 12 which is made fast thereon by` i a set screw 13. At the outer end of the opening 9 -i-n the man-hole cover 3 is arranged a stufling box or packing 14 for the shaf't, to

make a steam t1ght jont. Upon the outer face of the man-hole cover 3 is secured a fixed plate or bearing 15 which is' suitably bent and vhasits respective ends made fast to the cover 3,' by means of rivets 16. This plate or bracket 15 is rovided with a perforation 17 through whic the rotary shaft 10 passes, and the shaft is "rovided at its ou-ter end with a band-whee or pulley 18, for driving the shaft. i' f A portion of the shaft in the vicinity of the fixed plate 15, is provided with an external screw-thread 19, .and u on this thread, to- Ward the inner side4 of te fixed plate, works an adj ustable 'bearing-plate or nut .2-0., having an interior screw-thread fitting the thread 1.9 on the shaft. The periphery of this bearing plate or nut 20, is provldedfwith small holes 21 within which the end of a rod may be inserted to turn the nut on the thread on the shaft, in one direction or the otherfto adjust `it toward the -fixed plate 15, or away from the same as the case may be. A nut 22 similar to' Ithe nut 20, is mounted on the screwthread19, to the inner side thereof and serves as a am-nut for the nut or plate 20.

To the eXterior of the fixed plate 1,5 there is mounted upon the screw-thread .19 on the `shaft, a pair of nuts 20' and 22', similar to the nuts 20 and 22, just described, and which operate in the'same way. It will be underto be adjusted relatively to the fixed bea'ring plate 15, in such a .manner, to take up `all of -stood, that the nuts 20, 22, and 20', 22? are.

the apparatus is placed in operative position i economizing the amount of coal used as well lwater would otherwise remain dead or have the end-thrust received by the shaftlO of the agitator in its operation, there being considerable such thrust thrown upon the shaft by the pressure in the boiler as Well as the operation of theagitated blades themselves. This will prevent the outwardly directed endthrust on the shaft 10, from pressing the fixed collar 12 against the inner face of the man-hole, thereby avoiding a great amount of friction, which would otherwise be produced, and transferring same to the exterior part 15, which may be always kept well oiled and pro erly adjusted, it being easily accessible om the exterior of the boiler.

It will be understood that my improved apfiaratus may be applied to'Scotch-marine bo ers or any other type of boilers and that it may be located in any desired part of the same, either directly on the wall of the boiler itself or upon the detachable man-hole cover or plate which .latter method I have shown' as eing the preferred one, for in such case without cutting or in any way injuring' the' boiler proper. .Of course, the drive shaft 10 ma be driven by a motor or in any suitable We -known manner. The different parts of meta or any other desired well-known mate- Iial and the`various different parts may be modified or changed without departing from the spirit of the invention.

The method herewith shown of agitatin or circulating the water by this mechanica means is a Practical and positive method and serves to lncrease the steaming quality of the boiler and which, of course, results in as protecting the boiler against scale and keeping it free from sediment, The agitator be placed in any .desired part of theW may boi er and particularly at a place where the the least circulation. Of course, any wellknown form of a 'tator or stirrer may be used in lace of t e ordinary propeller-like,

device w 'ch I have herewith shown and the invention will be found to be particularly applicable to marine boilers.

' Having thus described my invention what I claim and desire to secure by Letters Patent is:-- I I. The combination of a boiler rovided with a man-hole having a removab e cover, means for securely looking the cover in place, a ,rotary shaft 10 extending through said Irfan-hole cover and havinga bearing thereon, an agitator mounted 'upon the inner part of said shaft so as to be maintained within the body of water within the boiler.

' 2. `lThe combination of a boiler provided with a man-hole having a removable cover, means for securely looking the cover in place,

'a rotary shaft 10 extending through said man-hole cover yand having a bearing thereon, an agitator mounted upon the inner part 'of said shaft so as to be maintained within the bodyof water within the boiler, a collar 12 mounted upon the inner part of said shaft, and an adjustable bearing for the shaft located upon the exterior of the said man-hole cover.

3. The combination of a boiler rovided with a man-hole having a removab e cover, means for securelylocking the cover in place, a rotary shaft 10 extending through said man-hole cover and having a bearing thereon, an agitator mounted upon the'inner part of said shaft so as to be maintained within the body of water within the boiler, a collar 12 mounted upon the inner part of said shaft, a bracket 15 secured upon the exterior of said cover and rovided With a perforation 17 through which said shaft passes, nuts 20 and '22 mounted upon said shaft 10 upon o posite sides of the bracket 15, for receiving t e end thrust of the shaft. t

In testimony whereof,'I have hereunto set my hand in the presence of the two Subscribing` witnesses.

EDWIN J. WHEELER. Witnesses:

WILLIs FOWLER, THOMAS McDoNAD. 

